MOBILE RF LINEAR AMPLIFIER

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MOBILE RF LINEAR AMPLIFIER Powered By Docstoc
					                                                                                                                                                               www.telstar-electronics.com
                                                                                                                                                                                    847-231-3372

                           2879ABTC
                           2879ABTC
                           2879ABTC                    MOBILE RF LINEAR AMPLIFIER




        Features
             Premium Quality PC Board, Components, and Aluminum Chassis
             13.8VDC
             10 Meter Amateur Band Coverage (26-30MHz)
             2SC2879 Push-Pull Configuration with Beta/Gain Matched Transistors
             All Mode (CW, AM, FM, SSB)
             Temperature Compensating Class-AB Biasing
             Low Harmonic Content
             High Efficiency
             Polarized Detachable Power Cord
             COR (Carrier Operated Relay) or Multiplexed Keying1
             SSB Delay to Eliminate Relay Chatter
             Remote Operation Ready
             Reverse Polarity Protected
             Fuse Protected
             Extremely Low Standby Power
             SO-239 Coaxial Interface Connectors
             High Reliability Design
             90 Day Limited Warranty

1
    Contact Telstar Electronics for details on using this feature



                       The SkyWave 2879ABTC has an implied warranty to be free of defects in materials and workmanship for a period of 90 days from purchase. This
                       warranty covers workmanship, parts (excluding power transistors), and labor. If it’s determined that the amplifier has been used for a purpose other
                       than intended, abused, or altered in any way, the warranty shall be void. Specifications subject to change without notice.

                                                                                           Page 1 of 4
                                                                                                                                                                   Last Updated - 10/7/2006 9:37 AM
                                                                                                                                                                         Model #2879ABTC Revision A
                                                                                                                                                        www.telstar-electronics.com
                                                                                                                                                                             847-231-3372

                    2879ABTC
                    2879ABTC
                    2879ABTC                    MOBILE RF LINEAR AMPLIFIER

Electrical Specifications
                   PARAMETER                                                VALUE                                                 NOTES / CONDITIONS
                   Voltage Requirements                                    +13.8VDC                                          +15VDC Maximum
                   Current Requirements                                 28A @ 13.8VDC                                        Maximum
                        RF Power Output                           130W RMS / 325W PEP (SSB)                                  @1dB Compression2
                          RF Input Power                            7W (AM, FM) / 28W PEP                                    Maximum
                                Efficiency                                    67%                                            Maximum
                             nd
                            2 Harmonic                                     -33dBc3                                           100W CW @ 28MHz (Typical)
                            3rd Harmonic                                    -30dBc                                           100W CW @ 28MHz (Typical)
                        Input Impedance                                    50-Ohms                                           Low Reactive Component
                       Output Impedance                                    50-Ohms                                           Low Reactive Component
                                      Gain                              16dB @ 28MHz                                         Typical
                            Gain Flatness                                     1dB                                            Over Specified Bandwidth
                               Bandwidth                                  26-30MHz                                           -
                   Collector Bias Current                                   500mA                                            +/-10% (-30 to +85°C)
                                      Fuse                                    30A                                            AGC Glass Slo-Blo Type
                         Stand-By Power                                      5mW                                             Maximum
                                   Weight                                     3.1                                            Pounds
                              Dimensions                              8" x 4.25" x 3.25"                                     Length x Width x Height


2
    Driving amplifier into compression region can negatively impact harmonic performance.

3
    Decibels below carrier.




                The SkyWave 2879ABTC has an implied warranty to be free of defects in materials and workmanship for a period of 90 days from purchase. This
                warranty covers workmanship, parts (excluding power transistors), and labor. If it’s determined that the amplifier has been used for a purpose other
                than intended, abused, or altered in any way, the warranty shall be void. Specifications subject to change without notice.

                                                                                    Page 2 of 4
                                                                                                                                                            Last Updated - 10/7/2006 9:37 AM
                                                                                                                                                                  Model #2879ABTC Revision A
                                                                                                                                              www.telstar-electronics.com
                                                                                                                                                                   847-231-3372

          2879ABTC
          2879ABTC
          2879ABTC                    MOBILE RF LINEAR AMPLIFIER

RF Performance @28MHz




      The SkyWave 2879ABTC has an implied warranty to be free of defects in materials and workmanship for a period of 90 days from purchase. This
      warranty covers workmanship, parts (excluding power transistors), and labor. If it’s determined that the amplifier has been used for a purpose other
      than intended, abused, or altered in any way, the warranty shall be void. Specifications subject to change without notice.

                                                                          Page 3 of 4
                                                                                                                                                  Last Updated - 10/7/2006 9:37 AM
                                                                                                                                                        Model #2879ABTC Revision A
                                                                                                                                                              www.telstar-electronics.com
                                                                                                                                                                                   847-231-3372

                          2879ABTC
                          2879ABTC
                          2879ABTC                    MOBILE RF LINEAR AMPLIFIER

        Installation / Operation
               1.)    Find a suitable place for the amplifier to reside. Avoid areas that are confined and could
                      reduce proper airflow around heat sink as this can cause overheating and result in premature
                      failure. The amplifier can be positioned in any orientation, with the recommended position
                      being with the heat sink fins facing up for maximum convection flow.


               2.)    Wire the power cord (RED+ BLACK-) to a                 LENGTH (FEET)      RECOMMENDED WIRE TYPE
                      source capable of delivering 13.8VDC@30A.                    1-3              AWG #14 Stranded
                      The following are recommendations as to the                  3-6              AWG #12 Stranded
                      gauge of wire used to supply from the source                6-10              AWG #10 Stranded
                                                                                 10-20               AWG #8 Stranded
                      for various lengths. Note that the farther the
                      amplifier is from the power source, the larger the cross-sectional area of the wire needs to be
                      to ensure a minimal RF output power “sag” due to wiring voltage drop (See Table). It’s
                      important to note that in many installations, the BLACK wire can be very short and connected
                      locally to the chassis of the vehicle, providing that it represents vehicle ground.




               3.)    Plug power cord into rear connector of amplifier4. ►




               4.)    Attach a 50-Ohm impedance coaxial cable from transceiver to
                      RF IN connector on amplifier to driving source. ►

               5.)    Attach a 50-Ohm impedance coaxial cable from the RF OUT to
                      the antenna system. Make certain the antenna system has a
                      VSWR of 1.8:1 or less and is capable of handling up to 175W
                      RMS. ►


               6.)    Move the switch on the front panel to the ON position to activate amplifier5.


4
    Power plug is polarized and can only be inserted in one direction.
5
    When switch is in the OFF position the input and output of the amplifier are effectively coupled, making the amplifier transparent to the system.




                      The SkyWave 2879ABTC has an implied warranty to be free of defects in materials and workmanship for a period of 90 days from purchase. This
                      warranty covers workmanship, parts (excluding power transistors), and labor. If it’s determined that the amplifier has been used for a purpose other
                      than intended, abused, or altered in any way, the warranty shall be void. Specifications subject to change without notice.

                                                                                          Page 4 of 4
                                                                                                                                                                  Last Updated - 10/7/2006 9:37 AM
                                                                                                                                                                        Model #2879ABTC Revision A